/* libwatopt++ - Optimization Toolkit
 *
 * Copyright (c) 2007 Christopher Alexander Watford
 * <christopher.watford@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * $Id: hill_climber.hpp 2 2007-05-06 18:01:15Z christopher.watford $
 */

#if _MSC_VER > 1000
#pragma once
#endif /* _MSC_VER > 1000 */

#ifndef _HILL_CLIMBER_HPP_
#define _HILL_CLIMBER_HPP_

#include <opt.hpp>

namespace watopt
{

   class HillClimberOpt : public IOptimizer
   {
   public:
	   HillClimberOpt(size_t maxSteps);
	   virtual ~HillClimberOpt(void);

      virtual void Initialize(IFitnessImplementation* guess);
	   virtual IFitnessImplementation* Solve(void);
      virtual void GetSolutions(std::vector<IFitnessImplementation*>& solutions) const;

   private:
	   IFitnessImplementation* _m_Best;
      size_t _m_Steps;
   };

   class RandomRestartHillClimberOpt : public IOptimizer
   {
   public:
	   RandomRestartHillClimberOpt(size_t maxtries, HillClimberOpt *climber);
	   virtual ~RandomRestartHillClimberOpt(void);
   	
      virtual IFitnessImplementation* Generate(void) = 0;
	   virtual IFitnessImplementation* Solve(void);
      virtual void GetSolutions(std::vector<IFitnessImplementation*>& solutions) const;

   protected:
      IFitnessImplementation* _m_Best;
      std::vector<IFitnessImplementation*> _m_Solutions;

   private:
      HillClimberOpt *_m_Climber;
      size_t _m_MaxTries;
   };

   class GreedyHillClimberOpt : public HillClimberOpt
   {
   public:
	   GreedyHillClimberOpt(size_t maxSteps);
	   virtual ~GreedyHillClimberOpt(void);
   	
      virtual void Initialize(IFitnessImplementation* guess);
	   virtual IFitnessImplementation* Solve(void);
      virtual void GetSolutions(std::vector<IFitnessImplementation*>& solutions) const;

   private:
      size_t _m_Steps;
      IFitnessImplementation *_m_Best;
   };

}

#endif /* !defined(_HILL_CLIMBER_HPP_) */
